In view of the paucity of activation marker expression in the peripheral blood, we have hypothesised that these CD69+, CD49a+, and CD103+ (triple positive) cells are retained in the lung, possess effector function (IFNγ secretion) and express particular chemokine receptors which allow them to be maintained in this environment.
We have found that the ability of the triple negative cells to secrete IFNγ is significantly less than the triple positive cells, suggesting that the expression of activation markers can highlight a highly specialised effector cell. We have studied the expression of 14 chemokine receptors and have found that the most striking difference between the triple negative cells and the triple positive cells is the expression of CXCR6 with 12.8±9.8 % of triple negative cells expressing CXCR6 compared to 89.5±5.5 % of triple positive cells.
We propose therefore that CXCR6 may play an important role in the retention of T cells within the lung.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址:北京市海淀区学院路29号 邮编:100083 电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700 |